4721999 Excavator Spare Parts Compressor for ZX200-5G ZX240-5G ZX330-5G

The Hitachi original excavator air conditioning compressor (part number: 4721999) is the core refrigeration component of the Hitachi excavator cab air conditioning system, responsible for compressing and delivering refrigerant, providing a comfortable driving environment for operators. As an original standard component, it is mainly suitable for Hitachi ZX series 5G generation medium-sized excavators, including common models such as ZX200-5G, ZX240-5G, ZX330-5G, etc. The common part number may vary depending on different suppliers or regions, but the original part number 4721999 is a key identifier to ensure a complete match with the Hitachi original car air conditioning system pipeline interface, electrical plug, installation bracket, and pulley size.

The air conditioning compressor is the "heart" of cabin comfort, with its core function being driven by the engine belt to suck in low-temperature and low-pressure gaseous refrigerant and compress it into high-temperature and high-pressure gas, which is then transported to the condenser for heat dissipation, thereby driving the entire air conditioning refrigeration cycle and achieving rapid cooling and dehumidification in the cabin. As an original component, it strictly follows Hitachi's quality standards and usually adopts efficient and reliable vortex or piston structures, with the characteristics of high refrigeration efficiency, smooth operation, low noise, and long service life. Its design has high working pressure, excellent sealing performance, and can withstand the test of excavator vibration and high temperature working conditions

The maintenance core of this air conditioning compressor lies in regularly checking its working condition, keeping the system clean, and preventive replacement of worn parts. Daily inspection: It is recommended to start the air conditioner every 250 working hours to check the cooling effect and monitor for any abnormal noise (such as knocking or friction) during compressor operation. Before high load use in summer, it is recommended to check if the refrigerant pressure is normal and clean the condenser fins to ensure good heat dissipation. Professional maintenance: Every 2000 working hours or every two years, it is recommended to have professional personnel conduct a comprehensive leak detection of the system, and supplement refrigerant and refrigeration oil if necessary.